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A carrier-based PWM strategy for three-level neutral-point-clamped voltage source inverters

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4 Author(s)
Srirattanawichaikul, W. ; Dept. of Electr. Eng., Chiang Mai Univ., Chiang Mai, Thailand ; Kumsuwan, Y. ; Premrudeepreechacharn, S. ; Wu, B.

This paper present a modified modulation strategy based on a triangular carrier wave for the three-level neutral-point-clamped (NPC) voltage source inverter (VSI). The switch states of each leg are determined by comparison between the modulation signals and a triangular carrier wave, which is used only of one triangular carrier wave for generate the gating pulses in three-level NPC VSI. The feasibility of the proposed modulation technique is verified by simulation and experimental results. These results show that a proposed carrier-based PWM technique can be easily implemented are provided to verify the proposed modulation strategy.

Published in:

Power Electronics and Drive Systems (PEDS), 2011 IEEE Ninth International Conference on

Date of Conference:

5-8 Dec. 2011